Improved compressive strength of reticulated porous zirconia using carbon coated polymeric sponge as novel template
Improved compressive strength of reticulated porous zirconia using carbon coated polymeric sponge as novel template
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DOI：
10.1016/j.matlet.2006.01.031
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发表时间：
2006-09-01
影响因子：
3
通讯作者：
Kim, Hyoun-Ee
中科院分区：
文献类型：
--
作者：
Jun, In-Kook;Koh, Young-Hag;Kim, Hyoun-Ee
以碳包覆聚合物海绵为模板剂，制备了网状致密多孔氧化锆膜。在这项技术中，聚合物海绵首先涂上一层碳黑浆，然后再涂上氧化锆浆。通过引入逃逸碳涂层，使严重弯曲的三角形聚合物压杆变得更圆，从而在烧结式氧化锆压杆内部产生了大的圆形三角形空洞。在96%的孔隙率下，制备的样品的抗压强度为0.85+/-0.13 Mpa，远高于不加碳涂层的样品(0.47+/-0.11 Mpa)。这一增强不仅归因于消除了三角形孔洞顶端的裂纹状缺陷，而且还归因于增加了对氧化锆柱内较大孔洞引起的压杆弯曲的阻力。(C)2006爱思唯尔B.V.保留所有权利。
Strong reticulated porous zirconia was fabricated using a carbon coated polymeric sponge as a novel template. In this technique, a polymeric sponge was first coated with a carbon black slurry, before coating it with the zirconia slurry. The introduction of the additional fugitive carbon coating layer was used to make the severely curved triangular polymeric struts more round, consequently producing large rounded triangular voids within the sintered zirconia struts. The fabricated sample showed a high compressive strength of 0.85 +/- 0.13 MPa at 96% porosity, which was much higher than that of the sample fabricated without the carbon coating layer (0.47 +/- 0.11 MPa). This enhancement was attributed not only to the elimination of the crack-like defects at the apices of the triangular voids, but also to the increased resistance against the strut bending caused by the larger voids within the zirconia struts. (c) 2006 Elsevier B.V. All rights reserved.